Section 6 − Operating The Welding Generator; Front Panel Controls - Miller Bobcat 225 Owner's Manual

SECTION 6 − OPERATING THE WELDING GENERATOR

6-1. Front Panel Controls

1 Engine Control Switch
Use switch to start engine, select speed, and
stop engine. In Run/Idle position, engine runs
at idle speed at no load, and weld/power speed
under load. In Run position, engine runs at
weld/power speed.
.
Place switch in Run position to operate
most MIG equipment.
2 Engine Choke Control
Use control to change engine air-fuel mix.
To Start: pull out choke and turn Engine Con-
trol switch to Start position. Release switch
and slowly push choke in when engine starts.
.
If the engine does not start, let engine
come to a complete stop before attempt-
ing restart.
To Stop: turn Engine Control switch to Off
position.
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3 Engine Hour Meter
4 Weld Process Selector Switch
Y Do not switch under load.
Use switch to select type of weld output.
Wire (GMAW) Welding: Use a positive (+)
position for Direct Current Electrode Positive
(DCEP) and a negative (−) position for Direct
Current Electrode Negative.
Stick (SMAW) and TIG (GTAW Welding): Use
a positive (+) position for Direct Current Elec-
trode Positive (DCEP) and a negative (−) posi-
tion for Direct Current Electrode Negative.
Use AC position for alternating current.
5 Coarse Range Switch
Y Do not switch under load.
Use switch to select weld amperage range
when Weld Process Selector switch is in Stick/
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Tig position, or voltage range when switch is in
Wire position.
.
For best arc starts and when using weld
and generator power together, use a low
Coarse Range setting with the Fine con-
trol set at 7 or higher.
6 Fine Control
Use control to select weld amperage (Stick/
Tig) or voltage (Wire) within the range selected
by the Coarse Range switch. Control may be
adjusted while welding.
Set control at 10 for maximum generator
power.
Weld output would be about 110 A DC based
on control settings shown (80% of 70 to 150
A). Settings shown are typical for welding with
a 7018 (1/8) electrode.
.
See Sections 6-2 thru 6-4 for typical pro-
cess connections and control settings.
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Ref. 218 646-A